What Continuous Integration services/OS projects are most frequently used in the Rails community (if any)?
I’m used to Jenkins but I’m not sure this is widely used across the industry, at least compared with other options (e.g. Travis, Semaphore, CircleCI, Codeship, TDDium, TeamCity, etc.).
The reason I ask is I’m coaching developers new to Rails and I’d like to make sure that any experience with CI they gain is more likely to be with a CI environment they’ll encounter early on in their careers.